With a click of
button, you can lock or protect any of your sensitive/private PDF
documents. You can also use any of the standard Encryption methods - RC4/AES (40-bit, 128-bit, 256-bit) based upon the desired security level.

In addition to this, it also helps you set advanced restrictions to prevent Printing, Copying or Modification of target PDF file. To further secure it, you can also set 'Owner Password' (also called Permissions Password) to stop anyone from removing these restrictions.

'PDF Password Protector' includes Installer for quick
installation/un-installation. It works on both 32-bit & 64-bit
platforms starting from Windows XP to Windows 8.